End program box appears

not a problem as such just annoying !o/s xp pro sp2,when i log off everything is hunky dorey,but when the missus logs off on her account she gets a pop up box saying Moffice-ending programe please wait,if you chose to end the programe now you will lose any unsaved data blah..blah..even if she has used an office application or not (office 2000 premium ) any ideas ! as the missus is driving me nuts to fix it

Sometimes the system files (those required to run Windows properly) can become corrupted.

Here's how to run a check on your system files: • Click Start; Run.• In the Run box, type cmd.exe to open the command prompt window.• At the prompt, type sfc.exe /scannow• Press ENTER. If Windows finds problems with the system files, you will be prompted to insert your Windows XP installation CD to restore the files.

If no problems are found and the scan finishes, type exit and press ENTER.